in reply to Math::BigInt: couldn't load specified math lib(s), fallback to Math::BigInt::Calc at /usr/lib/perl5/site_perl/5.8.8/Crypt/DH.pm line 6

It just tells you that it couldn't find the C lib so it falls back to the pure Perl implementation for the calculations. Solution is to find which lib is missing or not in the path and link it properly to the module.
  • Comment on Re: Math::BigInt: couldn't load specified math lib(s), fallback to Math::BigInt::Calc at /usr/lib/perl5/site_perl/5.8.8/Crypt/DH.pm line 6

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Re^2: Math::BigInt: couldn't load specified math lib(s), fallback to Math::BigInt::Calc at /usr/lib/perl5/site_perl/5.8.8/Crypt/DH.pm line 6
by bingos (Vicar) on Jun 23, 2010 at 20:41 UTC
[reply]
      Iam seeing the same issue? Please help me if you already got the fix. Thanks so much. ~Rossi
[reply]
        Iam seeing the same issue? Please help me if you already got the fix. Thanks so much. ~Rossi

        Is it somehow unclear that you need to install either Math::BigInt::GMP or Math::BigInt::Pari? If you don't speak english, maybe you can try translate.google.com

[reply]
Re^2: Math::BigInt: couldn't load specified math lib(s), fallback to Math::BigInt::Calc at /usr/lib/perl5/site_perl/5.8.8/Crypt/DH.pm line 6
by tpreisinger (Initiate) on Jan 23, 2012 at 18:36 UTC

    I’m just a developer on my system and I have to have the system administrator install Perl Modules for me. After spending the good part of the day trying to get it to work he has given up. The SFTP does function but it reports the error

    “Math::BigInt: couldn't load specified math lib(s), fallback to Math: :BigInt::Calc at /usr/opt/perl5/lib/site_perl/5.8.8/Crypt/DH.pm line 6.

    He attempted to install the required modules but was not successful:

    cpan> install Math::BigInt

    CPAN: Storable loaded ok

    Going to read /.cpan/Metadata

    Database was generated on Fri, 20 Jan 2012 09:11:21 GMT

    Math::BigInt is up to date.

    cpan> install Math::Pari

    Math::Pari is up to date.

    He tried installing Math::GMP but got:

    ==========================================================

    WARNING! No GMP libraries were detected!

    Please see the INSTALL file.

    ===========================================================

    The SFTP takes 50 seconds for it to deal with the fallback. This is unacceptable so I will have use a different method to implement SFTP or use the NET::FTP module. Googling this error I see it is very popular too bad the install can’t be made less complicated.

[reply]

      It seems that GMP is a library external to Perl. Most likely, your system administrator would need to install that prerequisite as well. Usually, vendors provide precompiled packages of such libraries with the package manager of the OS.

[reply]
      The GMP warning sounds like your system is missing header files for libgmp (aka the development package for libgmp).
[reply]
[reply]

        I'm using cygwin and had the same problem. Yes it's an external library. I manage to get around this error after installing the Math library package called GMP. So for pure native Linux/Unix environment, it will need this RPM/DEB/Tarball installed.

        Description about gmp package: GMP is a free library for arbitrary precision arithmetic

[reply]
      Did you find a solution to the error? I am facing the same issue - where SFTP functions, but I get the warning at the beginning of the script. Thanks!
[reply]

        Did you find a solution to the error?

        Error says some library not installed, so the solution is to installing missing library

[reply]

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